Red Line 81215 SuperCool® Performance 50/50 Antifreeze & Coolant with WaterWetter® - 3.785L
Ready-to-use Red Line antifreeze and coolant for all makes and models with suitable petrol or diesel cooling systems requiring a conventional 50/50 ethylene-glycol coolant.
SuperCool® Performance combines a 50/50 pre-diluted antifreeze/coolant formulation with Red Line WaterWetter® technology. It is supplied ready to pour into the cooling system without the need to measure or add additional water.
Red Line states that the formulation maximises cooling-system performance through improved heat transfer, helping reduce operating temperatures by up to approximately 20°F / 11°C. It also provides protection against cavitation, corrosion and erosion in demanding cooling-system conditions.
SuperCool® Performance is suitable for petrol and diesel engines and Red Line specifies compatibility with all makes, all models and coolant colours. It is designed for modern cast iron, aluminium and brass cooling systems and is compatible with new or existing antifreeze.
- Product type: Ready-to-use antifreeze / engine coolant
- Product range: SuperCool® Performance
- Brand: Red Line Synthetic Oil
- Product reference / SKU: 81215
- Container size: 1 US gallon / approximately 3.785L
- Mix ratio: 50/50 pre-diluted
- Preparation: Ready to use — no additional water required
- Additive technology: Fortified with WaterWetter®
- Vehicle application: All makes / all models / any coolant colour where this coolant type is suitable
- Engine compatibility: Petrol and diesel
- Cooling-system materials: Cast iron, aluminium and brass
- Service protection: Up to 5 years / 150,000 miles
- Freeze protection: Approximately -34°F / -37°C
- Boil-over protection: Approximately 265°F / 129°C with a suitable 15 psi cooling-system cap
- Cooling performance: Can reduce operating temperatures by up to approximately 20°F / 11°C
- Protection: Helps protect against cavitation, corrosion and erosion
- Water-pump protection: Helps clean and lubricate water-pump seals
- Ethylene glycol: Yes
Fitment advice: Red Line specifies SuperCool® Performance for all makes and models and any coolant colour. It should nevertheless be used only where a conventional 50/50 ethylene-glycol antifreeze/coolant is appropriate for the vehicle. Do not mix coolant technologies where the vehicle manufacturer specifically prohibits mixing.
MX-5 application: Suitable as a cooling-system fluid for Mazda MX-5 applications where a compatible conventional 50/50 ethylene-glycol coolant is appropriate. One 3.785L container may not be sufficient for a complete dry-system refill on every MX-5 model, so check the required cooling-system capacity before ordering.
Other items to consider: When servicing the cooling system, you may also want to consider replacement radiator caps, hoses, hose clips, thermostats, water pumps and coolant-system seals where required.
Useful tools / consumables: Drain pan, filling funnel, protective gloves, workshop towels and suitable cooling-system bleeding equipment where required.
Difficulty guide: DIY Difficulty: Easy to Moderate. SuperCool® Performance is already pre-mixed, but complete coolant replacement requires correct draining, filling and bleeding of the cooling system.
Why Red Line? Red Line Synthetic Oil is known for high-performance lubricants, fluids and additives developed for demanding road, track and motorsport use. Red Line products are chosen by enthusiasts and workshops for their focus on protection, thermal stability, friction control and application-specific performance.
What’s in the bottle: One 1 US gallon / approximately 3.785L container of Red Line SuperCool® Performance 50/50 ready-to-use antifreeze/coolant with WaterWetter® technology.
Service notes: Allow the cooling system to cool completely before opening. Drain and refill according to the vehicle manufacturer's procedure, ensuring trapped air is correctly bled from the system. Never open a hot or pressurised cooling system.
| Make | Model | Sub Variant | Chassis / Code | Years | Power (PS) | Engine Codes | Fuel | Transmission | Notes |
|---|---|---|---|---|---|---|---|---|---|
| Universal | All makes / all models | Cooling-system application | — | — | — | — | Petrol / Diesel | Manual / Automatic | 50/50 pre-diluted ready-to-use antifreeze/coolant with WaterWetter®. Red Line specifies all makes, all models and any coolant colour. Suitable where this conventional ethylene-glycol coolant type is appropriate. |
| Mazda | MX-5 / Miata | NA / NB / NC / ND | NA6C / NA8C / NB6C / NB8C / NC / ND | 1990 onward | Various | Various | Petrol | Manual / Automatic | Covered by Red Line's all-makes / all-models application statement. Use only where a compatible conventional 50/50 ethylene-glycol coolant is suitable. Check required cooling-system capacity before ordering. |
| Vehicle Manufacturer | OEM Reference / Specification |
|---|---|
| Red Line | 81215 — SuperCool® Performance Antifreeze/Coolant, 1 US gallon / approximately 3.785L |
| Red Line | 50/50 pre-diluted, ready-to-use antifreeze/coolant fortified with WaterWetter® technology |
| Red Line | All makes / all models / any coolant colour |
| Red Line | Compatible with petrol and diesel engines |
| Red Line | 5 year / 150,000 mile protection |
| Red Line | Freeze protection approximately -34°F / -37°C |
| Red Line | Boil-over protection approximately 265°F / 129°C with a suitable 15 psi pressure cap |
| Red Line | Can reduce coolant operating temperatures by up to approximately 20°F / 11°C under suitable conditions |
| Red Line | Suitable for cast iron, aluminium and brass cooling systems |
| Red Line | Helps protect against cavitation, corrosion and erosion; helps clean and lubricate water-pump seals |
| Red Line | Contains ethylene glycol |
| Universal application | No direct vehicle-manufacturer OE replacement reference; universal aftermarket ready-to-use antifreeze/coolant |